<template>
  <div class="home">
    <van-tabs v-model="activeIndex">
      <van-tab
        v-for="item in channelsList"
        :key="item.id"
        :title="item.name"
        :name="item.id"
      >
        <ArticleList :id="item.id"></ArticleList>
      </van-tab>
    </van-tabs>
    <div class="btn-wrapper">
      <geek-icon name="search"></geek-icon>
      <geek-icon name="channel" @click.native="getChannels"></geek-icon>
    </div>
    <!-- 频道弹出层组件 -->
    <ArticleChannel
      ref="articleChannel"
      :channelsList="channelsList"
      :activeIndex.sync="activeIndex"
    ></ArticleChannel>
  </div>
</template>

<script>
import { userChannels } from '@/api/home.js'
import ArticleList from './components/article-list.vue'
import ArticleChannel from './components/article-channel.vue'
export default {
  name: 'Home',
  components: {
    ArticleList,
    ArticleChannel
  },
  data () {
    return {
      channelsList: [],
      activeIndex: 0
    }
  },
  methods: {
    getChannels () {
      this.$refs.articleChannel.isShow = true
    }
  },
  async created () {
    const res = await userChannels()
    this.channelsList = res
    this.activeIndex = this.channelsList[0].id
  },
  watch: {
    '$store.state.user.token': {
      async handler (newVal) {
        if (newVal) {
          const res = await userChannels()
          this.channelsList = res
          this.activeIndex = this.channelsList[0].id
        }
      }
    }
  }
}
</script>

<style lang="less" scoped>
.home {
  ::v-deep .van-tabs {
    height: 100%;
    display: flex;
    flex-direction: column;

    .van-tabs__line {
      background: @geek-color;
      height: 2px;
      width: 32px;
    }

    .van-tab {
      color: #9ea1ae;
    }

    .van-tab--active {
      font-size: 18px;
      color: #333;
    }

    .van-tabs__wrap {
      padding-right: 86px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    }

    .van-tabs__content {
      flex: 1;
      overflow: hidden;
    }

    .van-tab__pane {
      height: 100%;
    }
  }

  .btn-wrapper {
    position: absolute;
    right: 0;
    top: 0;
    width: 86px;
    height: 44px;
    background: #fff;
    display: flex;
    align-items: center;

    .geek-icon {
      flex: 1;
      text-align: center;
      font-size: 18px;
    }

    &::before {
      content: '';
      width: 20px;
      height: 44px;
      position: absolute;
      left: -20px;
      top: 0;
      background: linear-gradient(to right, rgba(255, 255, 255, 0), #fff);
    }
  }
}
</style>
